dV-DOSC dV-SUB Manual V3.0 June 2005 144
APPENDIX 1:
HOW DOES dV-DOSC BEHAVE WITH RESPECT TO WST CRITERIA
The second Wavefront Sculpture Technology criterion: STEP < λ/2 over the frequency range of
operation is fulfilled by a dV-DOSC array at low/mid frequencies.
With reference to Figure 93:
Acoustic centers between 8" speakers are separated by 25cm horizontally and 23 cm vertically. The
800 Hz crossover frequency utilitized for the low section corresponds to λ/2 = 21.5 cm so that WST
criteria is satisfied over the majority of the 8" operating bandwidth.
Figure 93: Front view of dV-DOSC array and vertically stacked DOSC waveguides
We have to fulfil the first WST criterion at higher frequencies since it is not possible to satisfy the
second WST criterion, i.e., the wavelengths are too small to have the acoustic centers of adjacent
components within λ/2. This is achieved by mounting a DOSC waveguide on the exit of each
compression driver – this shapes the wavefront into a flat, rectangular constant phase source. Arraying
DOSC waveguides and drivers then creates a flat isophasic ribbon that fulfils the first WST criterion
(greater than 80% fill up to a maximum of 7.5 degrees between enclosures).
To Next Page
Loading...
Need help?
General
